Frame-joint.



C. PINGERHU'T.

FRAME JOINT. IIIIIIIIIIIIIIIIII LY`29 1912,

1,1 30,807 y Patented Mar. 9, 1915.

CARL FINGERHUT, OF CHICAGO, ILLINOIS. Y

FRAME-JOINT.

Specification of Letters Patent. y

Patented Mar. 9, 1915.

Application filed July'29, 1912. Serial No. 712,125.

To all whom it may concern Y Be it known that I, CARL FINGERHUT, asubject of the Emperor of Germany, and a resident of the city ofChicago, county of Cook, and State of Illinois, have invented certainnew and useful Improvements in Frame-Joints, of which I do declare thefollowing to be a full, clear, and exact description, reference beinghad to the accompanying drawing, forming a part of this specification.

The invention designs to provide a neat, strong and eective union forthe joints of picture frames, window screens, window sashes, or othersorts of frames in which the parts are to be united by bevel joints toconstitute a stout inclosure for the retention and support of someseparate fabric or the like.

The nature of the improvements will appear in detail from thedescription following and be more distinctly pointed out by claims atthe conclusion.

On the drawings: Figure 1 is a plan view showing the dual frame piecesdisunited at the corner, bevel joint, one of the kerf seats beingdisplayed in section. Fig. 2 is a like view but with the companion framepieces abutted together and the lock-pin set for admission to the camslot. Fig. 3 is a view similar to Fig. 2, but with the lock-pin turnedto a snug seat against the cam slot. Fig. 4 is a cross section view atthe bevel on line 4 4 of Fig. 2. Fig. 5 is an elevation view of thescrew loclr-pin detached.

The ordinary picture-frame, for example is made up of four separatepieces, united by bevel joints at the corners, which are generallysecured together by nails or screws driven through and across the jointsfrom opposite edges of the companion dual frame pieces. The nails orscrews leave unsightly holes that need to be puttied and, besides, areapt to split or impair the strength of the frame, especially if thestuff chosen be thin or fragile.

The present invention aims to dispense with nails, screws or the likealtogether and to employ instead internal fasteners mounted in placebeforehand, in readiness to interlock, once the frame pieces adjacentare brought together at the oint, for permanent union.

At each corner of the rectangular frames m, n, there is a tongue apivoted as at b in a kerf seat o cut in the bevel edge of one of theframe pieces. Tongue a projects into a free kerf or slit c cut in theopposite bevel edge of the companion frame piece. The tongue has an openslot d at its front to co-act with a lock pin e which extends across theother kerf and is furnished externally with a screw head terminal. Aguide pin f on one frame piece seats in a corresponding hole f in theopposite and serves to position the tongue slot d with reference to thecross notch g in lock pin e. Once the slot d in tongue a passes beyondor clears the notch corner on joining together the bevel frame pieces,as in Fig. 2, it becomes feasible thereupon to turn the lock pin e byaid of a screw driver, so that the body of the pin shall roll againstthe adjacent cam-like edge or slot d to draw the two pieces tightlytogether, as in Fig. 3.

It should be noted that the outer edge of the cam-slot Z is undercut sothat a hook is formed at the end of the tongue a with which the pin ecoperates to swing the tongue about its pivot and thereby move the hookover the pin. By providing a pivotal tongue, the turning of the pin todraw the frame pieces' together does not tend in any way to draw theframe pieces out of proper alinement. It is obvious that changes may bemade in the details set forth without departure from the essentials ofthe invention as defined in the claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is:

l. In frame joints, the combination of a frame piece having a pivotaltongue proj ecting therefrom, said tongue having a cam slot undercut toform a hook at the end of the tongue, a companion frame piece recessedto seat said tongue and having a lock pin cross cut to engage said camslot and arranged to coperate with the hook of said tongue to draw theframe pieces together and swing said tongue upon its pivot,substantially as described.

2. In frame joints, the combination of a frame piece having a pivotaltongue proj ecting therefrom, said tongue having a cam slot at its endundercut to form a hook at the end of the tongue, a companion framepiece having @look pin cross cut torengage lsaid aline said framepiecessubstantia11y as decam slot of said tongue and arranged tocoscribed.' operate With the end hookthereof in oolrzw,V said framepieces together` and sW/ingnsuicl tongue upon 'its pvot,'one".of Said;frame pieces having a projecting dowel pin and theother a hole toreceive the same to thereby Witnes: Y

JAMES H. PEIRCE, ANNIE C. COURTENAY.

Y Y CARL 'F'rNGERHUr' obtained ve tziit's"zalfsii,V tilessing theCommissioner uitIPrtcs,`

Washington, D Q-fl Y

